package com.hsm.security;

import com.hsm.pojo.Permission;
import com.hsm.pojo.Role;
import com.hsm.pojo.User;
import com.hsm.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.security.core.GrantedAuthority;
import org.springframework.security.core.authority.SimpleGrantedAuthority;
import org.springframework.security.core.userdetails.UserDetails;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.security.core.userdetails.UsernameNotFoundException;
import org.springframework.stereotype.Component;

import java.util.ArrayList;
import java.util.List;
import java.util.Set;

@Component
public class SecurityUserService implements UserDetailsService {

    @Autowired
    private UserService userService;

    //根据用户名查询用户信息
    @Override
    public UserDetails loadUserByUsername(String username) throws UsernameNotFoundException {

        // 通过用户名查询user对象
        User user = userService.findUserByUsername(username);

        if(user == null){
            return null;
        }

        List<GrantedAuthority> list = new ArrayList<GrantedAuthority>();
        Set<Role> roles = user.getRoles();
        for (Role role : roles) {
            Set<Permission> permissions = role.getPermissions();
            for (Permission permission : permissions) {
                list.add(new SimpleGrantedAuthority(permission.getKeyword()));
            }
        }

        UserDetails userDetails = new org.springframework.security.core.userdetails.User(username,user.getPassword(),list);

        return userDetails;
    }
}
